CCD vs CMOS
CCD thiab CMOS yog ob hom duab sensors siv hauv cov koob yees duab digital. Yog vim li cas thiaj li muaj koob meej ntawm cov koob yees duab digital tau qhia txog CMOS sensors vim lawv pheej yig ua rau txo qis ntawm cov nqi ntawm cov koob yees duab digital. Thaum CCD sawv cev rau cov khoom siv sib txuas, CMOS yog ib qho luv luv ntawm kev pub dawb hlau oxide semi conductor. Ob lub sensors no siv cov thev naus laus zis sib txawv thiab kev sib piv ntawm ob yog zoo li piv cov txiv apples nrog txiv kab ntxwv. Tab sis nws yog ib qho tseem ceeb kom paub qhov txawv ntawm CCD thiab CMOS.
CCD thiab CMOS muaj lawv qhov kev ua tau zoo thiab qhov tsis muaj zog thiab tsis yog qhov yuav tsum tau ua kom zoo dua rau lwm tus. Txawm li cas los xij, kev thov ntawm superiority feem ntau yog ua los ntawm cov tuam ntxhab koom nrog ua ib qho ntawm ob hom duab sensors. Lub hom phiaj ntawm ob lub duab sensors yog los hloov lub teeb rau hauv hluav taws xob thiab tom qab ntawd ua nws rau hauv hluav taws xob teeb liab.
Nyob rau hauv rooj plaub ntawm CCD sensor, tus nqi ntawm txhua pixel raug xa mus los ntawm qhov tso zis tawm kom hloov mus rau qhov voltage, buffered thiab xa tawm-chip raws li cov teeb liab analog. Cov zis uniformity yog siab thiab tag nrho pixel them tuaj yeem hloov mus rau lub teeb ntes. Nyob rau hauv cov ntaub ntawv ntawm CMOS, txhua pixel muaj nws tus kheej them rau voltage hloov dua siab tshiab, thiab lub sensor feem ntau muaj xws li amplifiers, kho suab nrov thiab digitalization circuits kom cov nti tawm cov khoom siv digital.
Ob CCD thiab CMOS tau tsim nyob rau hauv 60's thiab 70's los ntawm Dr. Sawas Chamberlain. CCD tau dhau los ua thev naus laus zis zoo li nws yuav tsum xa cov duab zoo dua. Nws yog nyob rau hauv lub 90's uas CMOS pib los ua nrov nrog txoj kev loj hlob ntawm lithography. Niaj hnub no nws yog CMOS uas tau dhau los ua qhov tseem ceeb vim tias nws pheej yig dua li CCD thiab kuj yog vim muaj kev xav zoo sib xws.
Hais txog qhov sib txawv, cov neeg ua yeeb yam ntawm CCD tau hais tias lawv muaj kev nkag siab ntau dua li CMOS chips thiab yog li xa cov duab zoo dua hauv cov teeb pom kev tsis zoo. Lawv kuj tsim cov duab huv si thaum CMOS chips feem ntau cuam tshuam nrog cov teeb meem ntawm lub suab nrov, uas yog qhov tsis xws luag hauv daim duab.
Cov neeg txhawb nqa ntawm CMOS chips sib cav tias cov chips no pheej yig heev. Qhov no txhais ua tus nqi qis dua lub koob yees duab. Lawv kuj siv zog tsawg dua uas txhais tau tias koj tuaj yeem tua tau ntev dua ua ntej yuav hloov roj teeb yog tias siv CMOS hauv lub koob yees duab.
Summary
• CCD thiab CMOS yog cov npe ntawm cov duab sensors siv hauv cov koob yees duab digital.
• CCD yog them cov khoom sib txuas, thaum CMOS sawv rau kev pub dawb hlau oxide semi conductor.
• CCD tsim cov duab zoo tab sis kim tsim.
• CMOS, pheej yig tau ua rau txo tus nqi ntawm cov koob yees duab digital.
• CCD noj ntau zog, thaum CMOS tsis muaj zog tshaib plab.
